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Overheating 98 Pontiac Sunfire


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dishmael
New User

Oct 31, 2009, 6:42 PM

Post #1 of 9 (3631 views)
Overheating 98 Pontiac Sunfire Sign In

I have a 98 Pontiac Sunfire (2.2L). I have replaced the thermostat and the water pump. I have checked for signs of water in the oil and found none. It is still overheating. There are no signs of leakage that I have found. It has 130,000 miles. The hoses are do not seem to be under any pressure while running. (I can squeeze the hoses with my hand.)


(This post was edited by carjunky on Nov 17, 2009, 1:37 PM)


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 31, 2009, 6:44 PM

Post #2 of 9 (3625 views)
Re: Overheating Sign In

When is it overheating?
How hot does it get?
Are you losing any coolant?



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



dishmael
New User

Oct 31, 2009, 7:06 PM

Post #3 of 9 (3619 views)
Re: Overheating Sign In

It is overheating while driving. The temperature gage pegs out. No coolant lost due to leakage, maybe some due to overheating.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 31, 2009, 7:11 PM

Post #4 of 9 (3616 views)
Re: Overheating Sign In

The first thing you want to look at is the condition of the radiator. The symptoms would indicate either a radiator that just doesn't have the cooling capacity or a blown head gasket from a previous overheating.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



dishmael
New User

Oct 31, 2009, 7:15 PM

Post #5 of 9 (3612 views)
Re: Overheating Sign In

This the first overheating issue I have had since ownership. Three years. The capacity of the radiator should have come into play before now shouldn't it? Thanks for your assistance.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 31, 2009, 7:17 PM

Post #6 of 9 (3607 views)
Re: Overheating Sign In

Does it cool down when the car stops in traffic?



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



dishmael
New User

Oct 31, 2009, 7:25 PM

Post #7 of 9 (3603 views)
Re: Overheating Sign In

No, it does not cool down at all. I can't drive more than a mile without the temperature redlining. During the first overheating, two days ago, it seem to cool down some (not much)while driving 55 - 60. I attributed that to air cooling.


quintin9
User

Nov 2, 2009, 4:38 AM

Post #8 of 9 (3578 views)
Re: Overheating Sign In

the radiator could be clogged


78dodge
New User

Nov 10, 2009, 6:30 PM

Post #9 of 9 (3554 views)
Re: Overheating Sign In

What is the mixture of coolant?
Have you done a drain and flush on the system?
Changed the thermostat with the correct thermostat?
I have had thermostats bad right out of the box!






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